Skip to main content
. 2013 Feb;57(2):936–943. doi: 10.1128/AAC.00615-12

Table 2.

Pre-rRNA and mature rRNA quantitation during E. coli growth phases

Time point (min) OD600 CFU/ml Ratea Doublingb Generation time (min) rRNAc Pre-rRNAc Ratio Growth phase
Overnight culture 2.307 6.67E + 09 6,009 2 2,720 Stationary phase
0 0 5.90E + 05 5,942 110 54 Lag phase
30 0 5.70E + 05 28,427 457 62
60 0.003 8.63E + 05 0.18 1.20 50.08 55,278 696 79 Log phase
90 0.008 2.30E + 06 0.43 2.83 21.19 78,741 970 81
120 0.024 6.20E + 06 0.43 2.86 21.00 91,049 1200 76
150 0.068 1.91E + 07 0.49 3.24 18.51 98,782 523 189
180 0.175 6.53E + 07 0.53 3.55 16.88 61,571 235 262
210 0.409 2.30E + 08 0.55 3.64 16.50 38,033 208 183
240 0.707 5.27E + 08 0.36 2.39 25.14 29,801 114 260 Early stationary phase
270 1.095 1.17E + 09 0.35 2.30 26.14 19,610 42 466
300 1.466 2.33E + 09 0.30 2.00 30.00 13,162 25 536
330 1.686 3.23E + 09 0.14 0.94 63.74 7,608 11 665 Stationary phase
360 1.834 4.43E + 09 0.14 0.91 65.87 5,734 8 723
390 1.957 5.03E + 09 0.06 0.37 163.81 4,899 7 706
420 2.051 5.73E + 09 0.06 0.38 159.68 6,230 6 1,049
a

Growth rate in log units per 30 min.

b

Doublings per hour.

c

Copies per cell.